Refrigeration unit for trucks



FIG. 1 is a top plan view of a refrigeration unit for trucks showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image of the side shown.

The rear and bottom are plain and unornamented. 

The ornamental design for a refrigeration unit for trucks, substantially as shown and described. 